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RE: Uncompressed PCM

Posted by oscar (A) on August 25, 2007 at 16:13:32

In Reply to: Uncompressed PCM posted by Robertc88 on August 25, 2007 at 15:15:20:

There are quite a few Blu rays with uncompressed LPCM, DTS HD MA, and TrueHD. See link below. There is nothing technical holding back the Studios from releasing lossless audio tracks on Blu-ray movies. I strongly suspect HD DVD has to perform PQ vs. AQ tradeoffs due to bandwidth/capacity limitations before deciding to include lossless audio (which is in the shorter supply on HD DVD titles).

Your ability to play them back will depend on the hardware in your system. In my system, I don't have an HDMI-capable component other than the source player. I run HDMI directly to a DVI projector via an HDMI/DVI adapter. I run the player's 5.1 analog audio outputs to a multichannel (MC) analog preamp. The Player's coax (or optical, if desired) goes to a preamp/processor where DD/DTS decoding is accomplished and the pre/pro converts to 5.1 analog to the MC analog preamp.

The player supports the following analog outputs.

TrueHD 2 channel (HD DVD only)
TrueHD 5.1 (Blu-Ray only)
DTS 1.5Mbps core (only - Despite the DTS HD logo on the player)
DDplus (though I suspect this is really no better than DD
uncompressed LPCM 5.1

The player routes the following over Coax with capabilities similar as that for DVD players:
DTS 1.5Mbps
DD 5.1
2-channel LPCM ???? (I've never used it).

I haven't figured out HDMI well enough to figure out what it takes to support uncompressed PCM or DTS HD MA or DTS HD MR. My impression is the DTS HD MA decoding capability will need to reside in the player at a minimum. I don't know the specifics since I don't plan on buying an HDMI 1.3 pre/pro or DTS HD MA-capable source player in the near-term. And may not buy before the format war is resolved (if ever).

• Blu-ray Disc Statistics   (Open in New Window)

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